Measuring instrument



FIG. 1 is a top view of an embodiment of a measuring instrument showing my new design;

FIG. 2 is a first perspective view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is a second perspective view thereof; and,

FIG. 5 is a third perspective view thereof. 

CLAIM The ornamental design for a measuring instrument, as shown and described. 